16S 



SCIENTIFIC RECORD FOR 1884. 



in scientific periodicals, they need not be further alluded to here. We 

 may, however, point out that the series of measures of 61 (B) Cygni 

 alluded to on page 159 as having been made at Moscow between 1863, 

 May 16, and 1866, October 13, and published in Annales de PObservafoire 

 de Moscow^ vol. vii, 1 livraison, page 79 et seq., have been reduced by 

 M. Socoloff {loc. cit, vol. VIII, 2 livraisou), who finds — 



From measures of distance, 



parallax of 01 Cygni = 4- 0".4598±0".0550. 



From measures of position, 



parallax of 61 Cygni = + 0".4222±{)".0342. 



From combination of measures, 



parallax of 61 Cygni = + 0".4330±0".0291. 



The observations were made by Schweizer, Struve's comparison star 

 (9.4 mag.) being used. — A. M. TF. D., " The Observatory,''^ November, 

 1884, p. 335. 



From a report of a lecture by Dr. Gill on stellar parallax the following 

 is extracted : 



Parallaxes of stars which have been determined in the northern heavens ivith considerable 



accuracy. 



Kame of star. 



61 Cvgni 



Lalande 21185 



a Tauri 



34 Groom bridge... 



Lalaude 21258 



AOo 17415 



cr Draconis 



a LyrsB 



p Ophinchi 



a Bootis 



Gioombridgo 1830 



Bradley 3077 



85 Pegasi 



Parallax. 



0.50 



0.50 



0.52 



0.29 



0.26 



0.25 



0.36 



0.20 



0.17 



0.13 ? 



0.09 



0.07 



0.05 



Results of recent researches on the parallax of stars in the southern hemisphere. 



' G. = Gill; E. = Elkin. 



